Extract Workflow *

I am using the extract workflow (sample workflow with the installed files of the Geocortex), I plugged it to the site, but when I run it, in the first step, an empty box appears and a message that asks me to choose the layers that I want to extract, this box can’t be clicked to show the layers list, and nothing can be written in it. In the workflow designer I noticed that in this level the display form of this step has a list box and this list box has an empty task url field. What is the url that will be used in this field, and from can I get it if it is the problem? This is shown below with screen shots, and the tool (.xaml) is attached.

Regards,

Hani

1- Workflow

(https://support.geocortex.com/Data/Sites/1/userfiles/7633/extract.xaml) /Data/Sites/1/userfiles/7633/extract.xaml

2- The tool in the app.

/customer/servlet/servlet.FileDownload?file=00P6000000em18tEAA

3- The task url field

/customer/servlet/servlet.FileDownload?file=00P6000000em180EAA